A Java program that reads the file "input.txt" and calculates and prints the average of all integer numbers in this file. 

SAMPLE OUTPUT:

throws  FileNotFoundException

try/catch

OUTPUT SAMPLE #1 for input.txt: 1 2 3 4 5 6 x x x 8 12 x x 34 x x 10 20 Number # 1 is: 1 Number # 2 is: 2 Number # 3 is: 3 Number # 4 is: 4 Number # 5 is: 5 Number # 6 is: 6 Number # 7 is: 8 Number # 8 is: 12 Number # 9 is: 34 Number # 10 is: 10 Number # 11 is: 20 The average of 11 numbers/file = 9.55 OUTPUT SAMPLE #2 for input.txt: xxxxx x x x x xx x x x x x The file doesn't contain any integers. Exit program!

OUTPUT SAMPLE #1 for input.txt: 1 2 3 4 5 6 x x x 8 12 x x 34 x x 10 20 Please input the name of the file to be opened: input.tx --- File Not Found! --- OUTPUT SAMPLE #2 for input.txt: 1 2 3 4 5 6 x x x 8 12 x x 34 x x 10 20 Please input the name of the file to be opened: input.txt Number # 1 is: 1 Number # 2 is: 2 Number # 3 is: 3 Number # 4 is: 4 Number # 5 is: 5 Number # 6 is: 6 Number # 7 is: 8 Number # 8 is: 12 Number # 9 is: 34 Number # 10 is: 10 Number # 11 is: 20 The average of 11 numbers/file = 9.55 OUTPUT SAMPLE #3 for input.txt: xxxxx x x x x xx x x x x x Please input the name of the file to be opened: input.txt The file doesn't contain any integers. Exit program!

 

2.  A Java program that reads the file "input.txt" and writes all even values from this file into a new file called "output.txt." 

 

SAMPLE OUTPUT:  

throws  FileNotFoundException

try/catch

OUTPUT SAMPLE #1 for input.txt: xx x xx 10 12 1 3 5 34 x 2 5 7 9 x x 44 Found 11 numbers/file. Open the file output.txt to get the output. output.txt: 10 12 34 2 44  OUTPUT SAMPLE #2 for input.txt: xx xx xx  x  x x xxx xxx The file doesn't contain any integers. Exit program!

OUTPUT SAMPLE #1:   Please input the name of the file to be opened: input.tx --- File Not Found! --- OUTPUT SAMPLE #2 for input.txt: xx x xx 10 12 1 3 5 34 x 2 5 7 9 x x 44 Please input the name of the file to be opened: input.txt Found 11 numbers/file. Open the file output.txt to get the output. output.txt: 10 12 34 2 44 OUTPUT SAMPLE #3 for input.txt: xx xx xx  x x xxx x xx x x x Please input the name of the file to be opened: input.txt The file doesn't contain any integers. Exit program!